Improvement in attaching knobs to spindles



S. SELDEN.

Attaching Knobs to Spindles.

No.134,708. Patentedm.7,187s.

UNITED STATEs sAMUEL sELDEN, 0E ERIE, PENNSYLVANIA.

IMPROVEMENT IN ATTACHING KNOBS TO SPINDLES.

Specification forming part of Letters Patent No. 134,708, dated January7, 1873.

' elevation of the cap. Fig. 3 is a transverse section on line w a'.

Similar letters of reference denote corresponding parts in the figures.

The invention consists in attaching the knob to the spindle by means oftwo screw-nuts, one

A of which is screwed to its place before the knob is applied and theother afterward in such manner that they shall gripe or clasp the shankof the knob between them, as will be hereinafter explained.

In the accompanyingdrawing, A represents the spindle, made square in itscentral portion `so as to act upon the bolt or latch in the usualmanner, and substantially square throughout its entire length, or may beslightly rounded at the corners on the end or ends A', to prevent therotation of the knob, and at the same time to adapt it to receive ascrew-thread, a', on its rounded portion for the reception of jamb-nutsB B'. C is the shank portion of the knob, the shank G' of which is madehollow and is provided at its end with a web, c, having a square centralperforation corresponding in size to, and adapting the shank to receive,the end A' of and to rotate spindle A. D is the capor front portion ofthe knob, represented in this instance as dished or semispherical inform and of an internal diameter equal to the external diameter of theshank portion C, adapting. it to receive and lit snugly over the openend of the latter, and to give to the knob, when the two parts are thusunited, substantially the usual or any desired form. The front or capportion D is provided with a metal prong or tongue, D', which, wheretheV knob or cap is made of metal, may be cast with it, but where theknob or cap is made of porcelain or other similar material the prong ortongue D may be fastened in a manner similar to that usually employedfor fastening the shank or neckto mineral or porcelain knobs. The prongor tongue D extends within the neck or shank G', and is fastened theretoby a screw, c', passing through neck or shank C', and which, inconnection with a shoulder or lu g, d, in part D,against which the openend of part C rests, serves to prevent any end movement of the cap orfront D.

In applying the knob, the spindle is passed through the lock or door inthe usual way, one knob having previously been secured rmlyto one end.The jamb-nut B is then applied and turned up until it rests against therose or within the perforation in the door., rllhe shank portion (l isnext placed upon the spindle, with web c resting against nut B, and nutB' is then applied through the open end of the shank portion C, andturned up until it clamps the web c against either the rose or nut- B.The cap or front D is now applied as explained, and the knob is thusfirmly and accurately secured in place. Where it is desired to allowconsiderable adjustment, so as to provide for all thicknesses of doors,both knobs may be applied to the spindle as explained, but ordinarily itwill, perhaps, be found sufficient to fasten one of them in this manner,the other being permanently attached in any usual manner.

In the construction above described the neck C' may be made to overhangthe web c to a depth corresponding to the thickness of the lnut B, orthe latter may be covered within the usual socket in the rose orknob-plate. The shank portion C of the knob performs the function ofturning the spindle, operating the bolt, and opening the door, and this,as will be seen, without the aid or useof the perforated spindle andsmall screw ordinarily employed for connecting the shank with thespindle; and at the same time the knob is accurately adjusted to thedoor by means of the jamb-nuts B B', which take the strain in opening orclosing the door, and without the aid of the loose rings or washersusually employed for tightening the knob.

The cap D simply covers the open end of the shank portion G, withoutbeing subjected to strain, and may be made of any suitable material andwith any desired degree or character of ornamentation, as illustrated inFig. 2.

I am aware that knobs have been made in two parts, with a front or capsecured to the body ofthe shell Vv`by means of various devices, andals'othat knobs have been secured to their spindles by nuts; yet my presentconstruction is the only one, so far as I am aware, in which a knob canbe accurately adjusted to any required thickness of door, and at thesame time dispense with the drilled spindle and retaining set-screw.y wThis I accomplish by combining with the threaded spindle the dividedknob and jamb-nuts, and it will be readily seen that, so far asoperating the spindle is concerned,

V4the knob issecurely fastenedby .the two nuts Y B B', and thatthe knob'cannot be readily loosened by the ordinary use required of it.

As this method of fastening the 'knob t0 the spindle is 'independent ofand not affected by the means shown for attaching the cap or front ofthe knob -to the part C, I do not Wish to be limited to the use of thespur or tongue D'.

Having thus described my invention, What I claim as new7 and desire tosecure by Letters Patent, is-

In combination with the threaded spindle A A', the knob C D having theremovable front and being secured to the spindle by the nuts B B', oneon each side of the web c, substantially as described.

In testimony whereof I have hereunto set my hand this 12th day ofOctober, A. 13.18772.. t

SAMUEL SELDEN. Witnesses:

MATTHEW GRIsWOLD, Jr., F. OURTZE.

